package com.ouheng.common.utils;

import java.awt.BasicStroke;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.Shape;
import java.awt.geom.RoundRectangle2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Date;
import java.util.Hashtable;
import java.util.Random;

import javax.imageio.ImageIO;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.BinaryBitmap;
import com.google.zxing.DecodeHintType;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatReader;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.Result;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.common.HybridBinarizer;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
import com.ouheng.common.config.Constant;
import com.ouheng.common.domain.FileDO;
import com.qcloud.cos.COSClient;
import com.qcloud.cos.ClientConfig;
import com.qcloud.cos.auth.BasicCOSCredentials;
import com.qcloud.cos.auth.COSCredentials;
import com.qcloud.cos.model.PutObjectRequest;
import com.qcloud.cos.model.PutObjectResult;
import com.qcloud.cos.region.Region;

/**
 * 生成二维码
 * ClassName: QRCodeUtil 
 * @Description: TODO
 * @author zhanghui
 * @date 2018年7月30日
 */
public class QRCodeUtil {
	
	private static final String CHARSET = "utf-8";
	private static final String FORMAT_NAME = "JPG";
	// 二维码尺寸
	private static final int QRCODE_SIZE = 300;
	// LOGO宽度
	private static final int WIDTH = 60;
	// LOGO高度
	private static final int HEIGHT = 60;
	
	/**
	 * 生成二维码
	 * @param content	源内容
	 * @param imgPath	生成二维码保存的路径
	 * @param needCompress	是否要压缩
	 * @return		返回二维码图片
	 * @throws Exception
	 */
	private static BufferedImage createImage(String content, String imgPath, boolean needCompress) throws Exception {
		Hashtable hints = new Hashtable();
		hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
		hints.put(EncodeHintType.CHARACTER_SET, CHARSET);
		hints.put(EncodeHintType.MARGIN, 1);
		BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, QRCODE_SIZE, QRCODE_SIZE,
				hints);
		int width = bitMatrix.getWidth();
		int height = bitMatrix.getHeight();
		BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
		for (int x = 0; x < width; x++) {
			for (int y = 0; y < height; y++) {
				image.setRGB(x, y, bitMatrix.get(x, y) ? 0xFF000000 : 0xFFFFFFFF);
			}
		}
		if (imgPath == null || "".equals(imgPath)) {
			return image;
		}
		// 插入图片
		QRCodeUtil.insertImage(image, imgPath, needCompress);
		return image;
	}
	
	/**
	 * 在生成的二维码中插入图片
	 * @param source
	 * @param imgPath
	 * @param needCompress
	 * @throws Exception
	 */
	private static void insertImage(BufferedImage source, String imgPath, boolean needCompress) throws Exception {
		File file = new File(imgPath);
		if (!file.exists()) {
			System.err.println("" + imgPath + "   该文件不存在！");
			return;
		}
		Image src = ImageIO.read(new File(imgPath));
		int width = src.getWidth(null);
		int height = src.getHeight(null);
		if (needCompress) { // 压缩LOGO
			if (width > WIDTH) {
				width = WIDTH;
			}
			if (height > HEIGHT) {
				height = HEIGHT;
			}
			Image image = src.getScaledInstance(width, height, Image.SCALE_SMOOTH);
			BufferedImage tag = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
			Graphics g = tag.getGraphics();
			g.drawImage(image, 0, 0, null); // 绘制缩小后的图
			g.dispose();
			src = image;
		}
		// 插入LOGO
		Graphics2D graph = source.createGraphics();
		int x = (QRCODE_SIZE - width) / 2;
		int y = (QRCODE_SIZE - height) / 2;
		graph.drawImage(src, x, y, width, height, null);
		Shape shape = new RoundRectangle2D.Float(x, y, width, width, 6, 6);
		graph.setStroke(new BasicStroke(3f));
		graph.draw(shape);
		graph.dispose();
	}
	
	/**
	 * 生成带logo二维码，并保存到磁盘
	 * @param content
	 * @param imgPath	logo图片
	 * @param destPath
	 * @param needCompress
	 * @throws Exception
	 */
	@SuppressWarnings("null")
	public static String encode(String content, String imgPath, String destPath, boolean needCompress) throws Exception {
		BufferedImage image = QRCodeUtil.createImage(content, imgPath, needCompress);
		mkdirs(destPath);
		String file1 = new Random().nextInt(99999999) + ".jpg";//生成随机文件名
		
	     
		ImageIO.write(image, FORMAT_NAME, new File(destPath + "/" + file1));
		
		  File file = new File(destPath + "/" + file1);
		  
		  // 1 初始化用户身份信息(secretId, secretKey)
	        COSCredentials cred = new BasicCOSCredentials(Constant.ACCESSKEY, Constant.SECRETKRY);
	        // 2 设置bucket的区域, COS地域的简称请参照 https://cloud.tencent.com/document/product/436/6224
	        ClientConfig clientConfig = new ClientConfig(new Region(Constant.BUCKET));
	        // 3 生成cos客户端
	        COSClient cosclient = new COSClient(cred, clientConfig);
	        // bucket的命名规则为{name}-{appid} ，此处填写的存储桶名称必须为此格式
	        String bucketName = Constant.BUCKETNAME;
			
	     // 简单文件上传, 最大支持 5 GB, 适用于小文件上传, 建议 20 M 以下的文件使用该接口
	        // 大文件上传请参照 API 文档高级 API 上传

          
        	String ouheng="ouheng";
            // 指定要上传到 COS 上的路径
            String key = "/"+ouheng+"/"+DateUtils.format(new Date())+"/"+new Random().nextInt(99999999) + ".jpg";
            PutObjectRequest putObjectRequest = new PutObjectRequest(bucketName, key, file);
            PutObjectResult putObjectResult = cosclient.putObject(putObjectRequest);
//            FileDO sysFile = new FileDO();
//            sysFile.setUrl(Constant.PATH + putObjectRequest.getKey());
            String url =Constant.PATH + putObjectRequest.getKey();
            cosclient.shutdown();
            return url;
	}
	
	public static void mkdirs(String destPath) {
		File file = new File(destPath);
		// 当文件夹不存在时，mkdirs会自动创建多层目录，区别于mkdir。(mkdir如果父目录不存在则会抛出异常)
		if (!file.exists() && !file.isDirectory()) {
			file.mkdirs();
		}
	}
	
	public static void encode(String content, String imgPath, String destPath) throws Exception {
		QRCodeUtil.encode(content, imgPath, destPath, false);
	}
 
	public static void encode(String content, String destPath, boolean needCompress) throws Exception {
		QRCodeUtil.encode(content, null, destPath, needCompress);
	}
 
	public static void encode(String content, String destPath) throws Exception {
		QRCodeUtil.encode(content, null, destPath, false);
	}
 
	public static void encode(String content, String imgPath, OutputStream output, boolean needCompress)
			throws Exception {
		BufferedImage image = QRCodeUtil.createImage(content, imgPath, needCompress);
		ImageIO.write(image, FORMAT_NAME, output);
	}
 
	public static void encode(String content, OutputStream output) throws Exception {
		QRCodeUtil.encode(content, null, output, false);
	}
	
	/**
	 * 从二维码中，解析数据
	 * @param file	二维码图片文件
	 * @return	 返回从二维码中解析到的数据值
	 * @throws Exception
	 */
	public static String decode(File file) throws Exception {
		BufferedImage image;
		image = ImageIO.read(file);
		if (image == null) {
			return null;
		}
		CreateQrCode source = new CreateQrCode(image);
		BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
		Result result;
		Hashtable hints = new Hashtable();
		hints.put(DecodeHintType.CHARACTER_SET, CHARSET);
		result = new MultiFormatReader().decode(bitmap, hints);
		String resultStr = result.getText();
		return resultStr;
	}
	
	public static String decode(String path) throws Exception {
		return QRCodeUtil.decode(new File(path));
	}
	
}
